The word 'unspotted' is a straightforward English formation built upon the core Germanic root 'spot,' which originally denoted a mark or stain. The addition of the Old English negative prefix 'un-' creates the literal meaning "not marked." The participial suffix '-ed' functions adjectivally, indicating a state or condition. Over time, the concrete sense of being physically free from marks evolved into the figurative and moral senses of being blameless or undetected, demonstrating a common semantic shift from the visible to the abstract.

Structure: un (not) + spot (mark) + ed (adjective suffix) - un: A prefix of Germanic origin (Old English) meaning "not," used to form negatives. - spot: A root of Germanic origin (Middle English, from Old English spot or related to Middle Dutch spotte) meaning a mark, stain, or small area. - ed: A suffix of Germanic origin (Old English -ed, -od) used to form adjectives from nouns or verbs, meaning "having the quality of."